Method for rapidly acquiring impact fracture characteristics of brittle material

A technology of brittle materials and destructive characteristics, which is applied in the direction of testing the strength of materials by using one-time impact force, special data processing applications, instruments, etc., can solve the problem that the discrete element contact search algorithm consumes a lot of system resources, cannot determine the finite element and discrete element area, Static coupling method modeling difficulties and other issues, to achieve the effect of reducing pedestrian casualties, high execution efficiency and analysis accuracy, and strengthening protection measures

Inactive Publication Date: 2011-07-20
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0007] (1) In the impact damage analysis of brittle materials, the large number of discrete elements leads to the huge consumption of system resources by the contact search algorithm, and the execution efficiency is very lo

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  • Method for rapidly acquiring impact fracture characteristics of brittle material
  • Method for rapidly acquiring impact fracture characteristics of brittle material
  • Method for rapidly acquiring impact fracture characteristics of brittle material

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Embodiment Construction

[0032] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings, which are only preferred embodiments of the present invention, but the implementation and protection scope of the invention are not limited thereto.

[0033] In the isoparametric and inverse transformation method described in the present invention, a transformation between two coordinate systems is established, thereby transforming regular-shaped finite elements in the natural coordinate system into distorted finite elements in the global coordinate system, and Any point in the finite element with regular shape in the natural coordinate system can be mapped to the inside of the finite element with distorted shape in the global coordinate system through the transformation relationship between the two coordinate systems. Finite elements with regular shapes in the natural coordinate system are called parent elements.

[0034] First introduce t...

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Abstract

The invention discloses a method for rapidly acquiring the impact fracture characteristics of a brittle material, which comprises the steps that: the serial numbers of fracture-pending finite elements are obtained through finite element positioning components; according to the serial numbers of the finite elements, discrete element generating components are used for generating 8 discrete elementsinside each finite element by means of an isoparametric inverse transformation method, and according to the scale of the discrete elements, memory spaces are allocated in an internal memory of a computer adopting the method; and kinematic and mechanic information of each finite element is transferred to the 8 discrete elements generated therein through element information transferring components so that the kinematic and mechanic information of the finite elements and the discrete elements before and after replacement are approximately equivalent; yjr information of the finite elements and the discrete elements in the internal memory are updated through element information updating components; and finally, fracture characteristics, such as crack extension, splashing of fragments and the like, of the brittle material under the action of impact load are rapidly acquired through fracture characteristic acquiring components.

Description

technical field [0001] The invention relates to a method for obtaining impact damage characteristics of materials, in particular to a method for rapidly obtaining impact damage characteristics of brittle materials. Background technique [0002] Brittle materials represented by ceramics, laminated glass, reinforced concrete, etc. have been widely used in aviation, machinery, construction and other fields, so their technical issues such as impact damage under dynamic loads have attracted more and more attention. With the in-depth study of the problem, it is necessary not only to grasp the macroscopic characteristics of the problem as a whole, but also to conduct microscopic analysis of the interested parts to reveal the damage characteristics of brittle materials such as crack propagation and fragment flying. [0003] The impact damage problem of brittle materials is essentially a complex mechanical process in which the material transforms from a continuum to a discontinuum. S...

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Application Information

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IPC IPC(8): G06F19/00G01N3/30
Inventor 臧孟炎徐伟雷周高伟
Owner SOUTH CHINA UNIV OF TECH
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